House Extensions Tottenham

GS Renovation builds extensions throughout Tottenham, working with the bay-fronted Victorian and Edwardian terraces that fill the N17 streets around Bruce Grove, White Hart Lane and Tottenham Green. We handle groundworks, steel, roofing and full fit-out, and guide you through Haringey planning where it applies.

In Tottenham, a single-storey rear extension typically starts from £40,000, or £2,000 to £2,800 per m² (indicative London ranges, Architecture for London, Resi, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Tottenham: the structural engineer we appoint designs the structure, we build it, and building control signs it off.

Side-return and rear extensions in Tottenham

A common project on a Tottenham terrace is the side-return infill, filling the narrow alley beside the rear closet wing to widen a cramped galley kitchen into a proper kitchen-diner. We dig and pour new foundations to building regulations depth, tie into the existing brickwork, and install a steel beam where the old external wall is removed, all signed off by building control.

Rear extensions off these Victorian and Edwardian homes work well too, and can be combined with the side return as a wrap-around. We match the stock brick and detailing so the addition sits comfortably against the period elevation, and set roof lights or a lantern over the deeper plan to keep the middle of the house bright, which matters on these long, narrow N17 plots. Most of the extensions we are asked about here are kitchen extensions: the side return and rear are built out so the kitchen moves into the new space and the old back room becomes the dining end. Planning the kitchen layout, the drainage runs and the beam position together at design stage means the sink, any island services and the rooflights land where the room needs them, rather than being fitted round a structure designed first.

Housing in Tottenham

For Tottenham the Council Tax list gives about 21,620 homes; by type 63% flats and 37% houses, by age 53% post-war, 12% interwar and 35% older than 1919. Since most homes here are flats, a flat in Tottenham has no householder permitted development rights, so extending one needs planning permission and the freeholder's consent.

Extending a Tottenham house on Tower Gardens or the High Road

Two parts of Tottenham have extension rules tighter than the general ones. On Tower Gardens, the appraisal lists extensions first among the changes its Article 4 Direction brings under planning control. So on that estate even a small rear addition that would be permitted development elsewhere goes to planning. Along the High Road, the Historic Corridor is made up of five conservation areas, and houses in those areas follow the conservation area limits, which are tighter than elsewhere. Check which regime applies before an architect draws anything, because it decides the size.

The conservation area limit is set in metres. In a Haringey conservation area, a single-storey rear extension needs planning permission once it goes more than 3 metres beyond the back wall, or 4 metres for a detached house. Semi-detached or detached houses are 2% of Tottenham homes, so 3 metres is the working limit. Any side extension, a side-return infill included, and any rear extension of more than one storey need planning there whatever their size. In Tottenham, a deeper kitchen extension in a conservation area is still possible, but through a planning application with drawings showing the neighbours' windows and the effect on their light.

Planning and party walls in Haringey

Whether your Tottenham extension is permitted development or needs a full application to Haringey Council depends on the property. Many single storey rear extensions fall under permitted development rights, but corner plots, previous additions or an Article 4 direction can take a project outside them, and in a conservation area a side extension or a two-storey rear addition needs planning permission. We assess your specific house first and, where needed, coordinate the drawings and see the application through.

Double storey and wrap-around schemes almost always need a planning application, and any extension still has to meet building regulations for structure, insulation, drainage and fire safety regardless of planning. Because the flank and rear walls of these terraces are shared, most extensions also trigger the Party Wall Act, so you serve notices on the neighbours either side as the building owner, using the drawings we supply, and the position is agreed, by consent or a surveyors' award, before the diggers arrive.

Kitchen extensions in Tottenham

63% of homes in Tottenham are flats, and a flat has no householder permitted development, so a ground-floor flat's kitchen extension needs planning permission from Haringey Council and the freeholder's consent. Most kitchen extensions here are on the 37% of homes that are houses. The fit-out is priced on its own page, kitchen renovation in Tottenham; the build figures are in the table above.

Double storey extensions in Tottenham

Under permitted development a two-storey rear extension can go no more than 3 metres beyond the original rear wall and must stay at least 7 metres from the rear boundary, and in a conservation area it is not permitted development at all. Many gardens are too short for the 7 metre rule, so a double storey extension in Tottenham often needs planning permission from Haringey Council. It is a job for the 37% of homes that are houses; a flat cannot add a storey this way. Haringey's HMO Article 4 Direction applies to wards including Noel Park, St Ann's, Seven Sisters, South Tottenham, Tottenham Central and Tottenham Hale (council source). Our double storey extension page explains the build, at £1,800 to £2,600 per m² across both floors.

• Brickwork and mortar matched to the existing elevation
• Building control inspections at foundation, damp course and steel stages
• Single and double storey extensions

VOA Council Tax stock of properties, March 2025, for all 6 statistical areas in Tottenham. Counts rounded by the VOA.

Two or three things usually come up alongside house extensions on a Tottenham job: RSJ and steel beam installation in Tottenham, house extensions across Haringey, side return infills, a garage conversion instead, house extensions anywhere in London and Side Return vs Rear Extension.

Why Tottenham Homeowners Choose GS Renovation

With GS Renovation you get one team from foundations to final decoration, so there is no gap between the groundworker, the steel and the finish. Our founder's 30+ years on the tools mean we know how these period terraces behave, how the council treats extensions locally, and how to keep an occupied home liveable while we build.

• Brick and mortar matched to the existing elevation
• Materials priced at options, so you choose the finish
• Weathertight shell reached before the fit-out begins

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.